Explosion-engine.



PATENTED FEB. 18, 1908.

G. P. PEARSON.

EXPLOSION ENGINE.

APPLICATION IILIID 113.13, 1907.

jfl-ve?? Z027 CTZmar-Jog casing 1.

mi TEn sTATEs PATENT OEEICE.

CARL F. PEARSON, CHICAGO, ILLINOIS, ASSIGNOR TO THE `'lIl-tIUIIPH MOTORCAR COMPANY, ACORPORATION OF ILLINOIS.

ExPLosroN-ENGINE. i

Specification of Letters Patent.

Patented Feb. 18, 1908.

Original application led September 22. 1906. Serial 110.335.835. Dividedand this application filed February 13. 1907.

' Serial lilo. 357.16m

To all whom it may concern:

Be it known that I, CARL F. PEARsoN, ad citizen of the United States,residing at Chicago, in the county of Cook and lState of Illinois, haveinvented certain new and useful Improvements in Explosion-Engines, ofwhich the following is a speciiication. The object of my invention is toprovide an lmproved reducing valve particularly adapted for use inconnection with the starting device for explosion engines described andclaimed in my companion application Serial No. 335,885,led on or aboutSeptember 22, 1906, of which application this is a division.

The drawing represents my improved valve in cross section, together withpart of the apparatus to which it is connected. The valve seat is formedat the lower part of a- This casing is screwthreaded at the lower end toafford means for attaching 1t to the engine structure. The casing isformed with an upwardly directed shoulder 2 and is screw-threaded at itsupperend. Seated upon the shoulder 2 is an outer casing ti between whichand the upper part of the inner casing 1 is an annular chamber 4. Ascrew-threaded cap 5 is mounted upon the upper end of the casing Landthe lower edge Of the cap bears upon the outer casing 3. Suitablepacking rings 6 upon the lower edge o f the cap and upon the shoulder 2afford a tight joint at the upper and lower edges of the outer casing 8.A hole is tapped `in the outer casing for the insertion of a pipe 7fwhich leads to a storage reservoir.

The lower end of the casing 1 is inserted in an opening in the enginecasing adjacent yto the intake valve of one of the four cylinders of theengine, and the interior of said cylinder communicates with thereservoir through the reducing valve. The bore 8 of the inner casing isprovided at its lower end with a conlcal valve seat 9. Co-acting withthis seat is a valve 10 the upper part of which is square in crosssection as shown at 11. The inner casmg is provided with radialperforations 12 opposite the square ypart of the valve, thus affordingdirect communication when the valve is unseated between the cylinderspace and the storage reservoir. The upper end4 of the valve is providedwith la stem 13 surrounded by a spring 14 which bears at itsl upper endagainst the cap 5 and at its lower 1n my parent application referred to,is to store some ofthe gases resulting from the i explosions, suchstored gases to be used for the purpose of turning the engine over instarting. lWhen the pressure due to .an eX- plosion in the cylinder withwhich the valve communicates is greater than that due to the spring 14,the valve 10 will be raised from its seat and part of the products ofcombustion Will pass into Y the storage reservoir. This action willcontinue during the subsequent explosions in the cylinder to which thevalve is connected until the combined pressure lof the gases continue inthe reservoir and of the spring 14 are greaterV than the pressure causedby such eX losions. When this point is reached the valve will remain"closed and the engine will operate in the usual manner, the products ofcombustion remaining in the cylinder until released by the opening oftheescape valve. If at any time the pressure in the reservoir falls belowthe desired limit the action of the valve will be automatically resumedand the desired pressure will be restored. Y -4 While I have describedmy improved reducing valve in connection with the startingdevice'de'scribed in my companion application referred to above, it willbe obvio us that it is adapted for use in connectlon wlth any mechanismwhere it is desired to accomplish a similar function. I'claim:

1. A reducing valve, comprising an inner casing provided with a shoulderon lts eX- terior, an outer casing resting at one end on said shoulder,and a cap engaging the opposlte end of the outer casing and a sovengaglng the inner casing. Y

2. A reduclng valve, comprlsmg a' cylindrlcal casing screw-threaded ateach'end,

' a shoulder on said casing, a screw-threaded cap on said casing, yanouter casing engaging said shoulder and cap forming a chamber whichcommunicates with the interior of said inner casing and a springpressedvalvev in said inner casing.

3. A pressure reducin valve for ex losion engines, comprising a tu ularportion aving u velve seat forme therein and radial cavities extendingthrough the shell thereof, a plunger portion formed of substantiallysquare stock and having a valve cone formed 5 upon one end and a springseat upon the other end thereof, a spring beari upon the spring seat andmounted withinnte tubular portion, a. cap threuded upon the end of thetubular portion and fomin1 a, seat for the spring, and a cylindrical sell portion in- 10 closing a portion of the tube and forming a tightchamber about such tube.

. CARL F. PEARSON. Witnesses:

W. W. SCOTT.

T. JONES.

